I know that due to format wars and the mechanical limitations of early jukeboxes, 7-inch phonograph records were designed to replace the small spindle hole that old 10-inch records had with a very large center hole. But LPs kept the very narrow center hole.
But the large hole always seemed quite a bit more practical, in my opinion. With the large center hole, one can place one finger on the outside edge and another finger on the inside edge and easily handle the record. But with LPs, unless you pinch the outside edge (not recommended), it is very awkward to put them back inside the album covers.
Did any company ever try making LPs with wide center holes? If not, why not?
It was a battle between RCA and Columbia for different formats.
Straight Dope discussion on it: http://boards.straightdope.com/sdmb/showthread.php?t=189393
But some 45s had the same hole as LPs if sold outside the US. http://bloggerhythms.blogspot.com/2009/08/why-do-45-rpm-records-have-big-holes.html